SECTION 3 -- FIELD OPERATION
3--54
Faster implement penetration may be required, for
example, after turning at a narrow headland. Also,
some implements are reluctant to penetrate,
particularly if the ground is heavy. Press and hold the
bottom of the raise/lower switch (4) and the
implement will lower at the rate set by the drop rate
control knob, until it contacts the ground. The drop
rate and the Position Control settings will then be
overridden and the implement will quickly penetrate
the ground, rising to the preset working depth when
the switch is released.
Alternatively, the adjustable stop may be used to set
the implement depth. When the required implement
depth has been established, rotate the thumbwheel
(1). This will move the stop (2) so that it is against the
front edge of the position control lever (3). Whenever
the implement is raised, using the Position Control
lever , it will always return to the same working depth
when the lever is moved forward to contact the stop.
NOTE: If required, the Position Control may be
eased sideways (to the left), in order to bypass the
stop, to lower the implement further.
94
The slip limit control knob (1), available only with the
optional radar sensor unit, enables the operator to
select a wheel slip threshold, above which the
implement will raise until wheel slip returns to the
preset level. The system overrides the normal Draft
and Position Control sensing signals of the
hydraulics so care must be taken not to select too low
or too high a slip limit. Setting the slip limit to a very
low level, unobtainable in wet conditions, may have
a detrimental effect on the work rate/depth.
95
The slip limit ‘on’ indicator (2) will illuminate when slip
control is activated and the implement is raising to
restore the selected slip rate. The knob is detented
at the ‘off’ position (knob fully clockwise).
96
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